Feb 26- A push by three U.S. airlines to curb competition from Gulf state carriers has exposed divisions over free trade with other powerful U.S. aviation players including Boeing Co and FedEx Corp, potentially complicating the airlines' campaign for Obama administration support. Delta Air Lines Inc, United and American Airlines have asked the White House to...

NEW YORK— American Express will increase the annual fee on some of its most popular charge cards, the company said Thursday, but the company also increased some of those cards' benefits as well. It's the latest move by American Express to strike a balance between keeping its loyal, mostly affluent customer base, but at the same also raise revenue when the company is...

NEW YORK— American Express increased interest rates on some of its credit card accounts by an average of 2.5 percentage points in recent weeks, a spokeswoman for the company said Wednesday. American Express had been charging a lower interest rate, as much as 3.25 percentage points, on its credit cards compared with rates its competitors charge for customers...